Respiratory Syncytial Virus



Respiratory syncytial virus (RSV) is a common cause of many types of infections of the respiratory system. The term respiratory system refers to the lungs and breathing passages. These infections include:
These infections are common. They are usually most severe in infants, young children, and older people. However, these infections can happen at any age. In severe cases, RSV infections can cause death.
Respiratory System Anatomy of an Infant
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RSV is spread through infected fluids in the mouth and nose. The virus most often enters the body from touching the mouth, nose, or eyes. It can also be spread by inhaling droplets from a sneeze or cough.
RSV is spreads easily. It can survive on surfaces and objects for hours. It is easily passed from person to person. Virus shedding usually lasts for 3-8 days, but may last for up to 4 weeks.

Risk Factors

RSV is more common in infants and young children, especially under 2 years old. Other factors that may increase your chance of RSV include:


The symptoms of RSV infection vary with age and previous exposure to RSV. Very young children, elderly people, and people with chronic diseases are more likely to have severe symptoms.
In children younger than three years old, RSV can cause illnesses such as bronchiolitis and pneumonia. Symptoms may include:
In children older than 3 years old, and healthy adults, RSV typically causes an upper respiratory infection or cold. Symptoms commonly include:


Your doctor will ask about you or your child's symptoms and medical history. A physical exam will be done. A variety of tests are available to diagnose RSV. Lab tests called antigen detection assays are commonly done using secretions from the nose.


In most cases, antibiotics are not needed because the infection is caused by a virus, not bacteria.

Mild Infections

Mild infections such as colds do not need special treatment. The goal is to ease the symptoms so that you or your child feels more comfortable while the body fights the virus. For symptom relief, try the following:
  • Drink plenty of liquids, especially water and fruit juice, to help keep nasal fluid thin and easy to clear.
  • Use a cool-mist vaporizer to humidify the air. This may help reduce coughing and soothe irritated breathing passages.
  • Use salt water nose drops to loosen mucus in the nose.
  • Use non-aspirin fever medication, such as acetaminophen, as needed to reduce fever.

Severe Infections

People of all ages can develop severe infections from RSV. However, it is most common in very young people. Severe infections include pneumonia and bronchiolitis. These may require treatment in a hospital. This treatment is aimed at opening up breathing passages. It may include:
  • Humidified air
  • Supplemental oxygen
  • Treatments to improve breathing
  • In certain cases, mechanical ventilation may be used if you or your child is unable to breathe without assistance


To help reduce your chance of RSV:


American Lung Association

Kids Health—Nemours Foundation


About Kids Health—The Hospital for Sick Children

Health Canada


Bronchiolitis. EBSCO DynaMed website. Available at: Updated September 11, 2015. Accessed September 14, 2015.

Respiratory syncytial virus. American Lung Association website. Available at: Accessed September 14, 2015.

Respiratory syncytial virus. Kids Health—Nemours Foundation website. Available at: Updated September 2012. Accessed September 14, 2015.

Respiratory syncytial virus (RSV). Centers for Disease Control and Prevention website. Available at: Updated November 4, 2014. Accessed September 14, 2015.

Respiratory syncytial virus (RSV) infection in adults. EBSCO DynaMed website. Available at: Updated June 30, 2015. Accessed September 14, 2015.

1/15/2010 DynaMed's Systematic Literature Surveillance Kabir AR, Mollah AH, Anwar KS, Rahman AK, Amin R, Rahman ME. Management of bronchiolitis without antibiotics: a multicentre randomized control trial in Bangladesh. Acta Paediatr. 2009;98:1593-1599.

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